Remove AudioBuffersState usage in Chromium

content/browser/media/capture/web_contents_audio_muter.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/media/capture/web_contents_audio_muter.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 29 matching lines @@
   virtual void Stop() OVERRIDE { consumer_.Stop(); }
   virtual void SetVolume(double volume) OVERRIDE {}
   virtual void GetVolume(double* volume) OVERRIDE { *volume = 0; }
   virtual void Close() OVERRIDE { delete this; }
 
  private:
   virtual ~AudioDiscarder() {}
 
   static void FetchAudioData(AudioSourceCallback* callback,
                              media::AudioBus* audio_bus) {
-    callback->OnMoreData(audio_bus, media::AudioBuffersState());
+    callback->OnMoreData(audio_bus, 0);
   }
 
   // Calls FetchAudioData() at regular intervals and discards the data.
   media::FakeAudioConsumer consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDiscarder);
 };
 
 }  // namespace
 
@@ skipping 83 matching lines @@
   is_muting_ = false;
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&AudioMirroringManager::StopMirroring,
                  base::Unretained(AudioMirroringManager::GetInstance()),
                  destination_));
 }
 
 }  // namespace content